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Diffstat (limited to 'source/blender/blenlib/BLI_iterator.h')
| -rw-r--r-- | source/blender/blenlib/BLI_iterator.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_iterator.h b/source/blender/blenlib/BLI_iterator.h new file mode 100644 index 00000000000..d3d375122a1 --- /dev/null +++ b/source/blender/blenlib/BLI_iterator.h @@ -0,0 +1,62 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Contributor(s): Dalai Felinto + * + * ***** END GPL LICENSE BLOCK ***** + */ + +#ifndef __BLI_ITERATOR_H__ +#define __BLI_ITERATOR_H__ + +/** \file BLI_iterator.h + * \ingroup bli + */ + +typedef struct BLI_Iterator { + void *current; /* current pointer we iterate over */ + void *data; /* stored data required for this iterator */ + bool skip; + bool valid; +} BLI_Iterator; + +typedef void (*IteratorCb)(BLI_Iterator *iter); +typedef void (*IteratorBeginCb)(BLI_Iterator *iter, void *data_in); + +#define ITER_BEGIN(callback_begin, callback_next, callback_end, _data_in, _type, _instance) \ +{ \ + _type _instance; \ + IteratorCb callback_end_func = callback_end; \ + BLI_Iterator iter_macro; \ + iter_macro.skip = false; \ + iter_macro.valid = true; \ + for (callback_begin(&iter_macro, (_data_in)); \ + iter_macro.valid; \ + callback_next(&iter_macro)) \ + { \ + if (iter_macro.skip) { \ + iter_macro.skip = false; \ + continue; \ + } \ + _instance = (_type ) iter_macro.current; + +#define ITER_END \ + } \ + callback_end_func(&iter_macro); \ +} ((void)0) + +#endif /* __BLI_ITERATOR_H__ */ |